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Mon Oct 5 17:06:21 EDT 2015 · https://mail.python.org/pipermail/python-dev/2015-October/141879.html

Not really being affected by the "python annotation movement", I supply 
some non-constructive comment:

I would not prefer any of these outcomes but would always allow all 
possible meanings that people wish to encode in the annotations.

My $0.02 and I am out.

On 05.10.2015 22:46, Steve Wedig wrote:
> Brett and Alexander,
>
> I am concerned about deprecation of arbitrary function annotations 
> because Pep 484 suggests that two paths are under consideration. Here 
> is the relevant section:
>
> "
> We do hope that type hints will eventually become the sole use for 
> annotations, but this will require additional discussion and a 
> deprecation period after the initial roll-out of the typing module 
> with Python 3.5. The current PEP will have provisional status (see PEP 
> 411 ) until Python 3.6 is released. The fastest conceivable scheme 
> would introduce silent deprecation of non-type-hint annotations in 
> 3.6, full deprecation in 3.7, and declare type hints as the only 
> allowed use of annotations in Python 3.8. This should give authors of 
> packages that use annotations plenty of time to devise another 
> approach, even if type hints become an overnight success.
>
> Another possible outcome would be that type hints will eventually 
> become the default meaning for annotations, but that there will always 
> remain an option to disable them. For this purpose the current 
> proposal defines a decorator @no_type_check which disables the default 
> interpretation of annotations as type hints in a given class or 
> function. It also defines a meta-decorator @no_type_check_decorator 
> which can be used to decorate a decorator (!), causing annotations in 
> any function or class decorated with the latter to be ignored by the 
> type checker.
> "
>
> I am advocating against paragraph 1 (a deprecation path) and for the 
> course of action stated in paragraph 2 :)
>

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Showing content from https://mail.python.org/pipermail/python-dev/2015-October/141879.html below:

[Python-Dev] Not Deprecating Arbitrary Function Annotations